Improvement in button-hole cutters



I.O.LEYPOLDT. BUTTONHOLE CUTTER.

No. 48,962. Patented July 25,1865.

' several views '18, 1860, with the new improvement attached.

U IT D STATES PATENT OFFICE.

IMPROVEMENT IN BUTTON-HOLE CUTTERS.

Specification forming part of Letters Patent No. 48,962, dated July 25,1865.

To all whom it may concern:

Be it known that I, FREDERICK O. LEY- POLDT, of the city of Philadelphiaand State of Pennsylvania, haveinvented a new and useful Improvement inInstruments for Cutting Button-Holes; andIdo hereby declare thefollowing to be a full and exact description thereof, 'reference beinghad to the accompanying drawings, and to the figures and letters ofreference marked thereon.

My invention relates to that classof these instruments in which a singleknife-edge produces the required cut in the cloth against a flat surfaceof softer metal; and its nature consists in asimple and effieient meansof-m aking this flat surface self-adjusting to the cuttingedge of theknife, so as to equalize the pressure of the cutting action over thewhole cut/ ting-surface. All instruments having a rigid bIock orcutting-surface require great accuracy in the relative fitting of theknife-edge and cutting-surface. They are very liable to getoutofwor'kingorder, and then are not easily. repaired.

Thelierei n -d escribed im pro vem en t overcomes these odjectionsentirely, and also permits easy and accurate adjustment of the length ofthe cut for various sizes of button-holes.

In order that my said invention may be fully understood, I will nowproceed more particw larly to describe the same.

On reference to the drawings making part of this specification, and inwhich similar letters of reference alludeto like parts throughout theFigure 1 represents a button-hole cutter of the construction patented bymyselfDecem her Fig. 2 shows the improvementas applied to anotherform ofinstrument, in which two levers are jointed, like ordinary scissors.Fig. 3 is a detached view, representing the manner of changing the looseblocks for different sizes of button-holes; and Fig. 4 is a modifiedform of self-adjusting block, with which, by means of a lateral changeof position, the length of the button-hole can be varied.

The lower jaw, A, of the instruments represented in Figs. 1, 2, and 3,is provided with a loose block, B, of a peculiar form, which blockreceives the pressure of the knife 0 in its cutting-action. This blockis confined in an appropriately-shaped recess or pocket in thejaw A, oneside of which is closed by the swinging latch D, the latter serving;when closed, to confine the block B laterally in its proper place,whilewhen opened,as in Figs. land3,it readily permits the inserlionjofvarious forms of blocks for dili'ercnt sizes of button'holes.

The block B is on its bottom provided with a rounded projection orbearing-point, 11,011

which it can rock for the purpose of adjusting itself to the knife-edgein cutting, the point b being in all cases placed central in relation tothe position and length of the top surface.

(Compare Figs. 1 and 3.) The ends ofthe block are slightly rounded toaccomodate' its rock- 'ing movement.

. Having thus explained the nature and object of my in vention,-I wishto be understood as not desiring to confine myself in the use of theimproved self-adjusting block to any one particular construction ofinstrument, since it is equally adapted to all forms ofinstrumentshaving a single cutting-edge. Neither do I wish to limitmyself to any particular method of confining the block in the instrumentor removing thesa-n'e; but

What I cla m as my invention, and desire to secure by netters Patent,is-

The described improvement in instruments for cutting button-holes,consisting in the use of the self-zuljusting block B, when the same isconstructed in relation to the knife U, substantially as and for thepurpose herein set forth.

FREDERICK O. LEYPOLDT. Witnesses:

THEODORE BERGNER, CHAS. E. PANCOAST.

